Cursor and other VSCode forks connect to Open VSX [1] for extensions. Barring some of the Microsoft extensions, I've found that pretty much all the extensions I use are available and kept up to date on Open VSX. Cursor seems to have enough funding to support their own variants of the Microsoft extensions, like Python and C++.
The one issue I've run into is that the VSCode version Cursor uses is several months old, so we're stuck using older extensions until they update.
The one issue I've run into is that the VSCode version Cursor uses is several months old, so we're stuck using older extensions until they update.
[1] https://open-vsx.org/